I wouldn't classify Zeppelin as a "rip off band" but, despite them being my favorite band, it's very hard to deny they stole a lot of shit. Turning black blues into almost unrecognizable, sprawling white blues is no excuse for not crediting the original artist. Even Elvis gave credit where credit was due and was loved by the artists he mimicked.
In most other genres like hip hop or electronic music artists give credit to the artists they sample. There's no excuse for what Zeppelin tried to get away with.
finally, a zephead with reason!
andf or the record: Levve Breaks is one of the few Zep songs/credits/stealings that I actually love. Very rarely do they get their 800-minute songs engaging throughout, so when they do, like in Levee, I listen. Other than the shameless theievery and their sprawling constant unimaginative masturb-sessions, the biggest reason I can't stand many of their songs is Plant's voice. He sounds like a Grandma with the lung power of a stereotypical black soul singer.
overall, they're a B- band with a A++ hype, which is a shame.